Subtraction Tutor Publisher: Nathalie Palma Genre: Education Released: 19 Mar, 2018 Size: 145.5 MB Price: $1.99 Click here to request a review of this app App Store Info Description Visually learn subtraction with ten frames. Teaches single digit and double digit with single digit subtraction using simple to understand ten frames. What's New in Version 1.2 Updated ui to handle iphone x+ sizes Screenshots Screenshot 1 of 8